JPS6027826B2 - Vortex generation device for intake air-fuel mixture in internal combustion engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intake mixture supply device for an internal combustion engine using a carburetor or a fuel injection device as a fuel supply means. This invention relates to a novel intake air-fuel mixture supply device that generates.

Mainly to help improve combustion efficiency in gasoline engines, guide vanes are installed in the middle of the intake path to create a vortex in the intake air-fuel mixture, thereby achieving uniform mixing of gasoline particles and miniaturization of the particles. It is being said.

However, the conventionally used vortex generation device
As shown in Fig. 6, the guide vanes of the annular vortex generating device 1' are deflected in the same direction. It is only possible to generate one simple system of eddies. Moreover, in the case of such a vortex flow, centrifugal force occurs during swirling, and the heavy gasoline particles are not mixed uniformly, but are forced into the pipe wall, resulting in the mixture becoming thicker on the pipe wall side and concentrated in the center. This results in a non-uniform mixing state in which the mixture becomes thinner, and the desired effect has not been achieved at present. In other words, until now it was only known that generating at least a calamity flow contributed to improving the performance of an internal combustion engine, but the fundamental technical idea of creating multiple systems for this had not yet been disclosed. be. The present invention has been made in order to eliminate the drawbacks of such a secondary method, and according to the present invention, when supplying the intake mixture into the combustion chamber, the intake mixture is supplied while generating multiple systems, It achieves complete combustion by achieving a higher rate of homogenization and miniaturization of gasoline particles, and a reduction in harmful exhaust gas components such as hydrocarbons and carbon monoxide. Below, the present invention will be specifically explained based on the illustrated embodiments. FIG. 1.

Incidentally, the symbol E indicates the engine body and the carburetor C.
The area between the engine E and the cylinder is defined as the intake path. In addition, when applying this device, it can be applied to ordinary 4-stroke gasoline engines, 2-stroke gasoline engines, rotary engines, etc.
In addition, the fuel supply means for these various engines may be of a fuel injection type in addition to a carburetor. The vortex generating device 1 has an annular shape as a whole, and a plurality of guide vanes 2 are integrally formed at the bottom thereof. This guide vane 2 is a part of the main body that is curved, and as shown in FIGS. 3 to 6, the guide vane 2 is a separated assembly consisting of a pair of guide vanes 2 whose vane tips are separated from each other. A set of silk b, b' consisting of a, a' and a pair of guide vanes with their blade tips facing each other
and an auxiliary guide vane c provided between them, and these are used in appropriate combination as one device. These various examples will be explained below.
The embodiments shown in FIGS. 7 to 10 are applied when a vortex generation device is attached to an intake pipe 1 having a circular cross section. First, in Fig. 7, a set of separated sets a, a' and a set of set lines b, b' are provided, and an auxiliary guide vane c is provided between them. It generates two systems of vortex flows as shown. Similarly, FIG. 8 shows four systems of eddy currents A, FIG. 9 shows 10 systems, and FIG. 10 generates 12 systems of vortex currents A. Incidentally, in the embodiment shown in FIGS. 9 and 10, the vortex A is generated by forming a large number of only separated sets a and a'. Furthermore, the 11th
13 shows an embodiment applied to an intake pipe 1 having an elliptical cross-section, but the present invention can also be applied to an intake pipe having an appropriate cross-sectional shape such as a rectangular cross-section.
11 to 13 show that two, four, and eight systems of vortex flow are generated in the elliptical intake pipe 1, respectively. Here, for example, in Fig. 13, the part surrounded by a solid circle ○ is the separated sets a and a', but if you look at it from a different perspective and look at the guide vane set surrounded by a broken line circle ○', these are correct. There is no other than the sets b and b'', and when the guide vanes 2 are disposed close to each other in this way, it may appear that each guide vane constitutes any set. No matter what group these are called, the actual state of their action remains the same. Furthermore, FIG. 14 shows an embodiment in which the guide vanes of this vortex generation device 1 are shifted in the direction of the intake pipe, and FIG. 15 shows an embodiment in which the vortex generation device is configured in multiple stages. This shows that. Of course, in this case, the vortex generating device is not formed as a separate member from the intake pipe 1, but is formed on the inner wall surface of the intake pipe 1 or on a heat insulator provided between the carburetor and the intake pipe. Good too. In the embodiment shown in FIGS. 14 and 15, the vortex of the air-fuel mixture is further generated along with the flow of intake air, and the mutual miniaturization of fuel particles is further achieved, resulting in an excellent combustion state. It is something that can be obtained. Furthermore, providing the guide vane 2 in the intake pipe means that it can be provided closer to the intake valve, and when this is done, multiple systems of vortex flow can flow along the cylinder axis. This can be done in a direction perpendicular to this. Therefore, the ignition condition within the cylinder can be improved. With such a specific embodiment, the intake air-fuel mixture 0 is made to swirl by the guide vane 2 while being supplied, and the center axes of the vortex flow of two or more systems are along the extension direction of the intake path. Multiple systems of vortex flows are formed.

In this way, the present invention fundamentally devises a new method for the intake air-fuel mixture supply device in an internal combustion engine.
The multiple systems of vortex flow within the intake pipe cause fuel particles to collide with each other, achieving further refinement and achieving favorable combustion conditions.

[Brief explanation of the drawing]

0 Fig. 1 is a partially cutaway side view showing the vortex generating device of the present invention installed in an internal combustion engine, Fig. 2 is a perspective view showing an embodiment of the device, and Figs. 3 to 6 are Plan views showing various combinations of guide vanes, which are elements of this device, FIGS. 7 to 13
The figure is a plan view showing five various embodiments of this device, FIGS. 14 and 15 are longitudinal sectional side views showing still other embodiments, and FIG.
The figure is a plan view showing a conventional type of device of this type. 1... Vortex generating device, 2... Guide vane, 1... Intake pipe, A
...vortex, C... auxiliary guide vane, a, a'... guide 0
Separate set of vanes, b, b'... set of guide vanes. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 9 Figure 8 Figure 10 Figure 11 Figure 12 Figure 13 Figure 15 Figure 14 Figure 16

Claims (1)

[Claims] 1 A guide vane is formed by bending a part of an annular body provided in the middle of the fuel mixture supply path of an internal combustion engine inward, and the guide vane is formed by the tips of the adjacent guide vanes. An intake air-fuel mixture vortex in an internal combustion engine characterized by comprising either one or both of a separating set formed to separate the guide vanes and a set set formed so that the tips of adjacent guide vanes approach each other. generator.